/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package datafu.hourglass.mapreduce;

import java.io.IOException;

import org.apache.hadoop.mapreduce.ReduceContext;

/**
 * Defines the interface for combiner and reducer implementations that {@link DelegatingCombiner} and
 * {@link DelegatingReducer} delegate to.
 * 
 */
public abstract class ObjectReducer extends ObjectProcessor {
  public abstract void reduce(Object key,
      Iterable<Object> values,
      ReduceContext<Object,Object,Object,Object> context) throws IOException,InterruptedException;
}